They told us they could provide funding for our real estate business, and having owned a business, I knew it was good to have lines of credit and other money than our own.

Purchase price: $81,000 Cash invested: $30,000 I acquired this property at an 11% cap rate, which provides strong immediate cash flow.

@Kenzer Hodgson For your STR, an umbrella policy can provide liability coverage, but an LLC offers additional asset protection by separating your personal and business assets, which can be valuable in case of lawsuits or audits.

And if you are need of MTR management services, my company, Island Stays Hawaii, provides premier STR and MTR management services.   

Please correct me if I'm wrong.You can require them to have insurance, but you cannot require them to purchase from a specific policy provider.

Landlord insurance covers the dwelling/property.Renters insurance has liability coverage which might provide you coverage if your tenant is negligent or liable for an accident/damages, etc.You can/should have your tenant list you as an "Additional Interest" on their policy. 

Homeowner insurance provides coverage for owner-occupied property.

Would it be safe to purchase a new fridge, deduct maybe 1/2 of cost to replace  current fridge door from the security deposit, provide receipt with explanation?

Also, what others have said, the personal touches on what is in your place (e.g. providing all the essentials instead of having people buy TP, coffee, shampoo, etc.) and the quality of those items (no tattered towels, stained sheets, etc.).  

Contact the utility provider and get a historical average based on the last year of use.